Method of skip applying adhesive to a carton panel

ABSTRACT

A CARBOARD BLANK FOR A CARTON HAVING A PANEL WITH A SLIT THEREIN. A FIRST SURFACE PORTION OF THE PANEL HAS A STRAIGHT-LINE ADHESIVE PATTERN THEREON, ADJACENT TO THE SLIT, AND A SECOND SURFACE PORTION OF THE PANEL, ADJACENT TO THE SLIT, HAS NO ADHESIVE PATTERN THEREON. THE SLIT IS ADAPTED TO PROVIDING ADHESIVE ON ONLY THE FIRST SURFACE PORTION OF THE PANEL IN CONJUNCTION WITH A METHOD FOR CONTACTING ONLY THE FIRST SURFACE PORTION OF THE PANEL WITH AN ADHE-   SIVE APPLICATOR WHEEL IN A STANDARD, STRAIGHT-LINE GLUING OPERATION.

Sept. 4, 1973 L O MEYERS ET AL 3,756,842

METHOD OF SKIP APPLYING ADHESIVE TO A CARTON PANEL Original Filed July 10, 1969 3 Sheets-Sheet l 2; was MM 22 /4 7... 5''

1 wwwww INVENTORS P404 JAMz-"S Efzkf 650/966 15907 M57545 fldm A TTUIQ/VFY 3 Sheets-Sheet 2 G. LE ROY MEYERS ET AL fflw METHOD OF SKIP APPLYING ADHESIVE TO A CARTON PANEL Sept. 4, 1 913 Origifial Filed July 10,

Sept 4,1973 G. LE ROY MEYERS ET' AL 3,756,842

METHOD OF SKIP APPLYING ADHESIVE TO A CARTON PANEL Original Filed July 10, 1969 3 Sheets-Sheet I5 INVENTORS PAUZ JAMES 361 X5 14 T OR/V' y United States Patent 3,756,842 METHOD OF SKIP APPLYING ADHESIVE TO A CARTON PANEL George Le Roy Meyers, Menasha, and Paul James Belke, Wausau, Wis., assignors to American Can Company, New York, N.Y.

Original application July 10, 1%9, Ser. No. 840,745, now abandoned. Divided and this application June 4, 1971, Ser. No. 150,245

Int. Cl. B4411 1/32 U.S. Cl. 117-11 6 Claims ABSTRACT OF THE DISCLOSURE A cardboard blank for a carton having a panel with a slit therein. A first surface portion of the panel has a straight-line adhesive pattern thereon, adjacent to the slit, and a second surface portion of the panel, adjacent to the slit, has no adhesive pattern thereon. The slit is adapted to providing adhesive on only the first surface portion of the panel in conjunction with a method for contacting only the first surface portion of the panel with an adhesive applicator wheel in a standard, straight-line gluing operation.

This application is a division of my copending application Ser. No. 840,745, filed July 10, 1969, and now abandoned.

BACKGROUND OF THE INVENTION The high-speed, low unit cost production of relatively small cardboard cartons for comestibles such as cakes and candies has typically required the use of equipment capable of manufacturing a carton blank at high production speeds. Where the resultant carton was to be formed by the use of an adhesive for fastening the panels thereof, the high speed manufacture of the blank has typically involved application of the adhesive by means of an adhesive applicator Wheel. The adhesive, as applied by an adhesive applicator wheel, formed an unbroken, straightline pattern across the surface portions of the blank physically contacting the wheel. Because of the inherent production advantages in providing an adhesive pattern by means of an adhesive applicator wheel, cartons and the blanks therefor have tended to be designed, when possible, with straight-line adhesive patterns.

When a blank for a carton was needed with a selected panel in the path of the straight-line adhesive pattern being left free of adhesive, the selected panel avoided the applicator wheel by being vertically rotated about a hinge line adjacent to the panel so as to prevent its contacting the surface of the wheel. In this way, a skip in a straightline adhesive pattern could be provided on a panel of a blank for a carton while taking advantage of the manufacturing economies available from using an adhesive applicator wheel.

However, in manufacturing a blank with a panel designed to have a straight-line adhesive pattern on one portion of the panel and a skip in the adhesive pattern on an adjacent surface portion of the same panel, the manufacturing practice has been to utilize a glue wheel with pads thereon, the pads being adapted to transfer adhesive from a transfer roller to the surface of the panel. Such a printing arrangement has not been completely satisfactory due to its concommitant production limitations as follows: relatively low production speeds; tailing of the adhesive pattern onto portions of the panel intended to be free of adhesive; and unsuitability for use with hot-melt adhesives. There has been a need therefore for a blank having a panel with an adhesive skip, the manufacture of which involves an adhesive applicator wheel rather than a glue wheel with pads.

SUMMARY OF THE INVENTION In order to provide a blank, for a carton, having a straight-line adhesive pattern on a first surface portion of a panel of the blank and having no adhesive on a second surface portion of the panel, the instant invention relates to a blank having a slit located between the two surface portions of the panel and adjacent to the adhesive pattern. The invention further relates to a method for skip applying adhesive to the aforementioned panel having a slit, in a standard straight-line gluing operation, by passing the panel adjacent to an adhesive applicator wheel; contacting the first surface portion of the panel with the applicator wheel; and not contacting the second sur face portion of panel with the applicator wheel.

Numerous additional advantages of the invention will be apparent as it is better understood from the following description, which taken in connection with the accompanying drawings, discloses a preferred embodiment thereof.

DESCRIPTION OF DRAWING FIG. 1 is a perspective view of the blank having a slit in a side panel thereof, the slit being located between a portion of the blank having a straight-line adhesive pattern already applied thereon and a portion of the blank having no adhesive pattern thereon.

FIG. 2 is a fragmentary, schematic, perspective view of a straight line adhesive pattern being applied to a blank as viewed from beneath the blank so as to make the blank of FIG. 1.

FIG. 3 is an enlarged, front elevational view, the blank being shown in section, of the adhesive pattern being applied to a blank as in FIG. 2.

FIG. 4 is a side elevational view of a partially formed carton, formed from the blank shown in FIG. 1, which includes the side panel having a slit therein, and which further includes a side panel having a zipper pattern therein and a locking fiap attached to an end panel having a second Zipper pattern therein.

FIG. 5 is a side elevational view of the formed carton shown in FIG. 4, the second zipper pattern having been removed to separate the locking flap from the end panel attached thereto.

FIG. 6 is a side elevational view, similar to FIG. 5, the first zipper pattern on the side cover panel having been removed to divide the cover into a released cover portion and a restrained cover portion.

FIG. 7 is a side elevational view, similar to FIG. 6, showing the released cover portion of the carbon, hingedly connected to and raised above the restrained cover portion of the carton.

FIG. 8 is a fragmentary, schematic perspective view of a straight line adhesive pattern being applied to a modified blank, as viewed from above the blank, similar to FIG. 2.

FIG. 9 is a front elevational view similar to FIG. 3, showing the adhesive pattern being applied to the modified blank.

DESCRIPTION OF THE PREFERRED EMBODIMENT As a preferred or exemplary embodiment of the instant invention, FIG. 1 shows a blank, generally 11, for a carton, having a pair of unique side bottom panels, generally 12, each of which panels 12 is provided with a slit 21. As shown in FIG. 1, the blank 11, is symmetrically constructed about a lengthwise center line drawn through the midsection thereof, the side bottom panels 12 of the instant invention being provided on both sides of the blank 11. Because of this symmetry, the discussion of the individual elements of the preferred embodiments of the blank 11, as well as of the methods of applying adhesive t the blank 11 will hereinafter be generally confined to half of the blank 11, the instant invention not necessarily requiring symmetry or a duality of elements therefor. However, the discussion with respect to the preferred embodiment of the instant invention should be considered as equally applying to the other half of the blank 11. The reason for providing the symmetry of the blank 11 as well as the need for a pair of side bottom panels 12, each having a slit 21, will hereinafter be more fully discussed with reference to FIGS. 4-7.

The side bottom panel 12 is hingedly connected to a bottom panel 13 of the blank 11. The bottom panel 13 is hingedly connected to a locking flap 14 and a first end panel 15, the first end panel 15 being hingedly connected to a cover panel 16. The cover panel 16 is hingedly connected to second end panel 17 and to a side cover panel 18. The end panels 15 and 17 are provided with hingedly connected first and second side end panels, 19 and 20 respectively. The exact construction of the side bottom panel 12 with slit 21 as well as of the other panels 1320 of the blank 11 will be hereinafter more fully discussed in connection with the description of the intended purpose of the side bottom panel 12 with the slit 21 of the instant invention.

The surface of the blank 11 is provided with a pair of straight line adhesive patterns, generally 30, each adhesive pattern being oriented parallel to and in surrounding relationship to the lengthwise center line of the blank 11. Each adhesive pattern on the blank 11 of the preferred embodiment traverses the surface of several side panels 12, 19 and 20 of the blank 11 but notably skips the entire side cover panel 18 and a portion of the side bottom panel 12 which are left entirely free of adhesive. The pair of adhesive patterns 30 generally conforms to the hot melt adhesive patterns conventionally applied by a pair of adhesive applicator wheels, which transfer adhesive from a reservoir to a paperboard surface contacting such wheels. The absence of adhesive or the skip in the adhesive pattern on the side cover panels 18 can be achieved either by conventionally rotating this panel 18 vertically about the hinged line of attachment to the cover panel 16, so as to avoid its contacting the applicator wheel, or by the mehod of the instant invention, without rotating this panel 18. However, the skip of applied adhesive on a portion of the side bottom panel 12 constitutes the novel feature of the adhesive pattern 30.

As shown in FIG. 1, the side bottom panel 12 of the instant invention specifically includes from right to left: a first portion 12A of the side-bottom panel 12 having a straight-line adhesive pattern on the surface thereof; the slit 21, adjacent to the adhesive pattern on the first portion 12A; and a second skip portion 128 of the side bottom panel 12 having no adhesive on the surface thereof and lying adjacent to the slit 21. Henceforth, the first portion 12A and the second skip portion 12B will be considered where appropriate as separate side bottom panels of the blank 11. Furthermore, for this discussion, both the first and second portions 12A and 12B should be visualized as lying wholly within the path of the straight line pattern of the adhesive applicator wheel across the side bottom panel 12.

For providing such a carton blank 11, with a straight line adhesive pattern 30, a preferred gluing method has been devolped involving the use of a moving blank 11 having a panel 12 provided with a slit 21. The adhesive 30 is applied by means of the following: a conventional, rotating, adhesive applicator wheel for continuously applying a hot melt adhesive; a rotating pressure wheel having a plurality of raised back-up pads, generally 44, secured circumferentially to the pressure wheel 43 and being positioned adjacent to the applicator wheel 40; and two stationary support bars 41 and 42 positioned close to the applictaor wheel 40 and between the applicator wheel 40 and the pressure wheel 43.

As shown in FIGS. 2 and 3, in the applying of the adhesive, the side bottom panel 12 with the slit 21 therein, as well as the other side panels 18, 19 and 20 of the blank 11 are moved successively past the adhesive applicator wheel 40 and over the support bars 41 and 42. The support bars 41 and 42 are spaced just above the applicator wheel 40 so as to assure that the blank will tend to travel slightly above the applicator Wheel 40. Of course, the whole arrangement could be easily inverted, requiring only that the support bars 41 and 42 be spaced below the applicator wheel 40. The support bars 41 and 42 further act to restrain portions of the blank not adjacent to the applicator wheel 40 from being urged toward the applicator wheel when portions of the blank adjacent to the wheel are urged to contact the applicator wheel. The pressure wheel 43 and the back-up pads 44 are designed to urge a portion of the blank located between the pressure wheel 43 and the applicator wheel 40 to contact the surface of the applicator wheel 40. In the preferred method for applying adhesive to the blank 11, the pressure wheel is sufiiciently close to the applicator wheel so that the height of the back-up pads 44 will tend to cause a portion of the blank to touch the applicator wheel, thereby causing a continuous straight-line adhesive pattern to be applied onto the surface of the blank.

As shown in FIG. 3, the back-up pads generally 44 are spaced about the circumference of the pressure wheel 43. The pressure Wheel 43 rotates in timed relationship to the moving blank such that as certain side panels 20, 19 and 12A of the blank 11, that are to receive adhesive, move adjacent to the applicator wheel 40, the successive spaced back-up pads 44A and 44B rotate coincidentally into position adjacent to the applicator wheel. The conjunction of the back-up pad and the side panel results in the side panel contacting the applicator wheel and in the applying of glue thereto.

In the same operation certain side panels 12B and 18 are left free of adhesive by providing back-up gaps 44C and 44D on the pressure wheel 43 between the back-up pads 44A and 44B which gaps rotate into position adjacent the applicating wheel coincidentally with the aforementioned adhesive-free side panels 12B and 18 and which gaps do not urge the aforementioned panels 12B and 18 to contact the applicator wheel.

It should be noted that the knife cuts 22 and 23 between the side panels 20, 18, and 19 permit these same panels to be sufiiciently flexed by the back-up pads 44 with respect to one another so that no tailing of adhesive occurs from the adhesive covered side panels 19 and 20 onto the adhesive-free side cover panel 18.

As particularly shown in FIG. 3, with reference to the side bottom panel 12, the slit 21 accomplishes the same result between the skip portions 12A and 12B as was accomplished by the knife cuts 22 and 23, for the side panels 18, 19 and 20, i.e.: allowing sufiicient flexing of the first portion 12A of the side cover panel 12, receiving the adhesive, with respect to the second skip portion 12B, being left free of adhesive, so that no tailing of the adhesive occurs onto the second skip portion 12B. To accomplish this result, the length of the slit 21 should equal or exceed the width of the adhesive pattern, the slit exceeding by inch the width of the adhesive in the preferred embodiment.

As will be obvious from the FIGS. 2 and 3, the method for providing the blank 11 having the desired adhesive pattern has included apparatus that is old in the art but the utilization of which is unique. By way of example, in the actual practice of the method of the present invention, a /2 inch width of a hot melt adhesive was applied to a blank substantially as shown in FIG. 1 on a conventional, right angle gluer, manufactured by International Folding Box Co., Beverley, Massachusetts. This right angle gluer had an applicator wheel 6 inches in diameter and a pressure wheel 12 inches in diameter with inch back-up pads thereon. The pressure wheel itself was a conventional glue wheel conventionally used with inch pads for printing adhesive directly onto blanks moving in timed sequence. The blanks in this example moved in timed sequence, and the applicator wheel 40 and the pressure wheel 43 moved in timed relation to the blank 11 by means of a standard timing belt. Using a 1-inch slit, a sharp break in the adhesive pattern between the first portion 12A and the second skip portion 12B on the side bottom panel 12 was achieved.

It should be noted that a panel, such as the side cover panel 12 of the instant invention, may be provided with more than one slit. It is anticipated that a single panel may be provided with a plurality of skip portions, the first skip portion of the panel not necessarily having adhesive thereon as in the first skip portion 12A of the preferred embodiment. In providing such a plurality of skip portions, it would be quite easy to utilize a plurality of back-up pads 44 so as to urge the first or subsequent skip portions to contact the applicator wheel 40.

The resulting blank, generally discussed in connection with FIG. 1, and concerning which the application of adhesive has been specifically discussed in connection with FIGS. 2 and 3, is intended to be used to form a carton wherein the sharp cut-off of an adhesive pattern on a single panel is particularly important. The blank 11 in FIG. 1 is designed to provide such carton, as more specifically shown in FIGS. 4-7, dealing particularly with an elevational view of the side panels 12, 19, 18 and 20 of the blank 11.

By way of further description of the blank 11, the side cover panel 18 is provided with a diagonal, first zipper pattern 50 extending from its outward edge to its hinged connection with the cover panel 16. The first zipper pattern 50 consists of the familiar parallel pattern of a plurality of scores serving to preweaken the side cover panel 18 to promote the tearing of this panel along this zipper 50. The first zipper pattern 50' also divides the side cover panel 18 into two portions consisting of an unrestrained side cover portion 18A and a restrained side cover portion 183, the latter to be adhesively secured to the first skip portion 12A of the side bottom panel 12, as will be explained in the discussion concerning FIG. 5. The blank 11 is also provided with a pair of co-linear lines of weakness or creased lines 35 on the cover panel 16. The creased lines 35 are located adjacent to the first zipper patterns 50 and each extends perpendicularly from the hinged connection between the side cover panels 18 and the cover panel 16. The creased lines 35 are intended to promote the folding of the cover panel 16 along these lines. The blank is further provided with a conventional, second zipper pattern 51, in the locking flap 14. The second zipper pattern 51 is adapted to promote the destruction of the locking flap 14 by the tearing of the second zipper pattern 51. The second zipper pattern 51, therefore, allows the connection between the locking flap 14 and the second end panel 17 to be destroyed by tearing (see below).

The carton 11 formed from the blank 11 is constructed as follows in FIG. 4: the blank 11 is folded into a rectangular sleeve, the locking flap 14 and the second end panel 17 being adhesively secured together; the side bottom panel 12 of the instant invention is folded upwardly; the first side end panel 19 is folded into overlying relationship to the side bottom panel 12 and the second side end panel 20 is similarly folded into overlying relationship to the side bottom panel 12. It should be noted that in accordance with the instant invention, the second side end panel 20 could be adhesively secured to the side bottom panel 12, if desired, by providing a second slit in the side bottom panel 12 for a third skip portion thereon to the right of the skip portion already provided. As will be clear, however, the carton 11 is not adapted for such a third skip portion on the side bottom panel 12.

As shown in FIG. 5, the carton 11 is further constructed as follows: the side cover panel 18 is folded into overlying relation and is adhesively secured to the other side panels 12A, 19 and 20. It should be noted that there is no adhesive bond between the side cover panel 18 and the second skip portion 12B of the side bottom panel 12, the slit 21 having prevented any adhesive from being applied there.

As shown in FIG. 6, in the completed carton 11 formed from the blank 11, the first zipper pattern 50 can be torn from the side cover panel 18. In connection with the opening of the familiar second zipper pattern 51 in the locking flap 14, secured to the second end panel 17, the tearing of the first zipper pattern 50 in the side cover panel 18 serves to release a front portion 16A of the cover panel 16 to the right of the crease line 35. The released cover portion 16A of the cover panel 16 is attached to the unrestrained, side cover portion 18A overlying the adhesive-free, second skip portion 12b of the side bottom panel 12.

As shown in FIG. 7, the released cover portion 16A is capable of hinged movement about the crease line 35 of the cover panel, not being adhesively restrained by the side bottom panel 12. The remaining, restrained portion 16b of the cover panel 16 is prevented from being lifted, along with the released cover portion 16A, by the adhesive bond between the restrained side cover portion 18B of the side cover panel 18 and the first skip portion 12A of the side bottom panel 12.

In effect, a hinged cover for the opened carton is formed, thereby, consisting of the released cover portion 16A, the second end panel 17 and the second side end panel 20.

As a modified embodiment of the blank 11 with a slit 21 and the method for providing a straight-line adhesive pattern thereon of the instant invention, FIG. 8 shows a portion of a modified blank, generally 111, having a locking panel 112 with a notch 121 therein. It should be pointed out that the correspondence of reference numerals between the elements of the original and the modified embodiments, such numerals differing by 100, is intended to indicate a correspondence of function and structure of such elements except as otherwise specifically pointed out. It should also be pointed out that the identity of reference numerals in the elements of the original and of the modified embodiments is intended to indicate a correspondence of function and structure of such elements.

As further shown in FIG. 8, the combined action of a pressure wheel 143, having a plurality of back-up pads, generally 144, thereon, and of an adhesive applicator wheel is utilized for applying a straight-line adhesive pattern onto a first portion 112A of the locking panel 112. As further shown in FIG. 8, the combination has not applied an adhesive pattern onto a second skip portion 112B of the locking panel 112, the two portions 112A and 112B being located adjacent to the notch 121.

Locking panel 112 of the modified embodiment differs in purpose from the side bottom panel 12 of the original embodiment. The locking panel 112 is intended to be adhesively secured to the end panel of a carton, the first portion 112A being provided with an adhesive pattern for this purpose. The locking panel 112 is further intended to be torn from the second panel to which it is secured, a third zipper pattern being provided along the length of the first portion 112A for that purpose. of course, neither the use of a notch nor of a slit in combination with a straight line adhesive pattern is intended to be confined to their respective uses indicated for them in the present discussion. However, the notch 121 of the instant invention is well adapted to provide the adhesive skip needed for tearing the locking panel 112 from an end panel such as the second end panel 17 of the first embodiment, the second skip portion 112B remaining free of adhesive and therefore being available to be grasped and pulled so as to tear the first portion 112A along the third zipper pattern 155 thereon.

Because the third zipper pattern 155 has been provided along the length of the first portion 112A, it has been found convenient to use a modified support means for restraining the locking panel 112 from contacting the adhesive applicator wheel 140. Rather than using two support bars located on either side of the applicator wheel and adjacent thereto, it has been found that a single support bar 141, lying parallel to the direction of travel of the moving blank 111 and adjacent to the first and second portion 112A and 112B, satisfactorily restrains the panel 112 and the second skip portion 112B from contacting the applicator wheel 140. The third Zipper pattern 155 facili tates the work of the back-up pads 144 on the pressure wheel 143, by acting as a hinge between the first portion 112A and the remainder of the locking panel 112. Because of this hinge effect, the force transmitted from the back-up pads 144 to the panel 112, through the first portion 112A, which transmitted force tends to urge the second skip portion 112B to contact the applicator wheel 140, need be resisted by the single support bar 141 of the second embodiment rather than by the two support bars 41 and 42 in the first embodiment.

As shown in FIG. 9, a straight-line adhesive pattern has just been applied to the first portion 112A with no tailing of the adhesive pattern, due to the notch 121, having occurred on to the adjacent second portion 112B. Related to these two skip portions are the first back-up pad 144A on the pressure wheel 143 and the first backup gap 144C on the pressure wheel 143, which pad and gap respectively urged and did not urge the respective portions 112A and 1128 of the locking panel 112 into contact with the applicator wheel 140 upon their coincidental movement into position adjacent to the applicator wheel 140.

As further shown in FIG. 9, a second back-up pad 1448 is utilized to provide a third portion 112C, the third portion 112C having an adhesive pattern thereon and being separated from the second skip portion 112B, having no adhesive thereon, by a second notch 121. This second notch 121 relates to the fact that as previously noted with respect to the first embodiment of the instant invention, provision could easily be made for multiple slits 21 and multiple skip portions. In the second embodiment then, the basis of the instant invention has been extrapolated to include multiple notches (or slits), multiple skip portions and multiple means for relative flexing of the skip portions so as to provide a panel having selected portions with and without adhesive thereon.

It should be finally pointed out that the terms slit and notch have been used in their generic sense. These terms are believed to connote therefore any means including a slit having a definite shape such as a U-shape, in a panel, which would allow portions of the panel adjacent to the means to be fiexed relative to each other during the application of adhesive by a straight-line gluing operation.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description and it will be apparent that various changes may be made in the form, construction and arrangement of the parts and that changes may be made in the steps of the method described and their order of accomplishment without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

What is claimed is:

1. A method of skip applying an adhesive to a panel of cardboard blank of a carton, comprising the steps of:

providing a slit in said panel so as to divide said panel with a first panel surface portion and a second panel surface portion, said first and second panel surface portions being separated by the slit; passing successively said first and second panel surface portions adjacent to a source of adhesive on an applicator wheel capable of applying said adhesive to said panel surface portions when said panel surface portions are in contact with said wheel;

simultaneously restraining said panel from contacting said wheel both before and after successive surface portions thereof have passed adjacent to said wheel; and urging said first panel surface portion into contact with said wheel as said first panel surface portion passes substantially adjacent to said wheel, said second panel surface portion not being urged into contact with said wheel, so that adhesive is applied to said first panel surface portion and is not applied to said second panel surface portion. 2. The method of claim 1 wherein the first panel surface portion is urged into contact with said wheel by means of a rotating pressure wheel having a plurality of raised back-up pads secured circumferentially to the prespressure Wheel.

3. The method of claim 2 wherein said adhesive comprises a hot melt.

4. A method of skip applying an adhesive to a panel of a cardboard blank for a carton, comprising the steps of: providing a notch in said panel so as to divide said panel with a first panel surface portion and a second panel surface portion, said first and second panel surface portions being separated by the notch;

passing successively said first and second panel surface portions adjacent to a source of adhesive on an applicator wheel capable of applying said adhesive to said panel surface portions when said panel surface portions are in contact with said wheel;

simultaneously restraining said panel from contacting said wheel both before and after successive surface portions thereof have passed adjacent to said wheel; and

urging said first panel surface portion into contact with said wheel as said first panel surface portion passes substantially adjacent to said wheel, said second panel surface portion not being urged into contact with said wheel, so that adhesive is applied to said first panel surface portion and is not applied to said second panel surface portion.

5. The method of claim 4 wherein the first panel surface portion is urged into contact with said wheel by means of a rotating pressure wheel having a plurality of raised back-up pads secured circumferentially to the pressure wheel.

6. The method of claim 5 wherein said adhesive comprises a hot melt.

References Cited UNITED STATES PATENTS 2,559,175 7/1951 Stoever 1l8---2l2 X 2,779,526 1/1957 Vogt 1l744 X 2,846,930 8/1958 Gross l182l2 X WILLIAM D. MARTIN, Primary Examiner T. G. DAVIS, Assistant Examiner US. Cl. X.R.

1l74, 37 R; 229-35 R, 51 TC, 51 TS 

